How to create a cluster for SQL Server 2005 on Windows Server 2003?

Hi,
I need to test an application using SQL Server 2005 as source in a clustered environment. But I was unable to create a cluster on Windows Server 2003.
Can anyone tell me how to create a cluster on Windows Server 2003?
Also, is it possible to create a logical cluster on the same machine?
If yes, what are the steps to create that?
Thanks in advance,
Shivani